Welding rod



April 1929. J. B. HAWLEY, JR 1,709,474

WELDING ROD Filed April 11, 1928 172w 2302" JO N B. HAM/A EYJ R metal coverin mada 1c, 1929. I

"The invention h'a's welding where. additional metal is added to'the metal to be welded. Q 1 @The' preferred embodiment of the inven- 6 tion is simpl a solid core rod of suitable weld- 1 mg material over which is deposited a suitable flux and then over the flux is drawn or shrunk a cover in the form of a metallic tube. It

may be however that this processof forming the rodwill be carried still further and additional fluxv coatin s and additiontal tubes or s scribed. In this manner it is ossible to form 1 a welding rod of as many ifi'erent metals .1 and as many'difierent fluxes as "may be de- .prevents the loss of fluxby evaporation at high temperatures. Further advantage lies in the application of flux evenly at the point of Welding so that less flux is required and the Work ls'not unnecessarily cove ed with flux. Other advantage lies in the a ility to usemetals that would segregate into proportions if melted into a solid rod; in other words it is possible to use metal "that will not evenly mix in large heats by applying them directly in'the manner'I describe. 4 Still 0 more saving'comesin the speed ossible for welding whenthe flux 'is',"appli'e inproper proportion and the fiux is protected from,

flame contact until it is needed at the imm'e diatepoint of application.

It is conceivable that the fluzi coating would be thick to a degree that the heating of the rod by conduction along the metal or absorptionoif radiant energy would cause flux to l flow from the space between the core and'the covering tube and run down into the weld.

To prevent this the-tube, may beheaded, 1 In thedrawin'gs: i H 4 The Fig.1- hows-al'ength of plain covered welding rod with section of covering cut,

back to demonstrate the positions of core flux and covering tube. v r

7 these grooves will Juneven solid electrolytic copper,

rod,

7 I Application area April 11,- 1928. Serial m. 269,286.

to do'with'the artofv Fig. 2 shows'the same as Fig. 1 exceptin cross section. a Fig.' 3 shows the same rod as Fig. 1 and Flg. 2 except beads ofannular design are rolled into the outer tube to prevent flux runmng at high temperatures i The solid metallic rod .1 i-s covered on its outer surface with fluxcoating 2. The tube 3 1s then drawn over the outside of rod 1 and flux coatmg 2. This drawing may be by swagmg or rolling or the tube 3 may even be rolled e added to the first def rom a sheet of metal and not be entirely closed over the outside of flux 2 It is also posslble that covering 3 be spirally wound over rod 1 and flux 2.

I A p y f In Fig. 3 it will be noted that annular rings The advantageof my construction lies in the fact that the; outside metallic coating are formed in the tube3 and are noted as typical by annular grooye 4. It is possible .that be formed as'spirals which would be about the same in effecting slow flow of flux as are the grooves 4 as shown.

ermg 3 will all be of different materials to suit special conditions. For instance one application would be for welding copper to steel; in this case the center-rod would be the flux borax glass, and the covering tube would be phosphor brpnze composed of ninety nine percent copper and nine tenths of one perceuttin and the remainder phosphorus and silver. Every con- QlllllOIl' would demand Sllll'lblG'. combinations of the rod, the flux, and the covering tube. Having thus described the invention-what is claimed is;

1. A welding rod comprising a solid core, flux'coverin the core, a metallic jacket'cov-T ering the ux, said jacket having pockets formed by rolling annular grooves therein.

2. A welding rod comprising a solid core flux covering the core, a metallic tube coverl ing the flux, said metallic tube being spirally grooved on its inner surface. a

, Itis possible that rod 1 and flux 2 and cov- I t timony whereof, I alfizr my signature. V

JoHN B. HAW'LEY, JRQ 

